<?php

/**
 * 图片处理类
 * 生成缩略图片使用方法说明
 * 
  $imgHandler_Obj = new ExtendsYspImageHandler();
  //设置图片路径
  $img_path = 被缩略的图片物理路径;
  $imgHandler_Obj->setSrcImg($img_path);
  //设置缩略图边框
  $imgHandler_Obj->setDstImgBorder(0, '#000');
  $imgHandler_Obj->setDstImg($img_path);
  //缩略图比例
  $imgHandler_Obj->createImg(图片宽度, 图片高度);
  unset($imgHandler_Obj);
 * 
 */
class ExtendsYspImageHandler {

    protected $dst_img; // 目标文件
    protected $h_src; // 图片资源句柄
    protected $h_dst; // 新图句柄
    protected $h_mask; // 水印句柄
    protected $img_create_quality = 100; // 图片生成质量
    protected $img_display_quality = 100; // 图片显示质量,默认为75
    protected $img_scale = 0; // 图片缩放比例
    protected $src_w = 0; // 原图宽度
    protected $src_h = 0; // 原图高度
    protected $dst_w = 0; // 新图总宽度
    protected $dst_h = 0; // 新图总高度
    protected $fill_w; // 填充图形宽
    protected $fill_h; // 填充图形高
    protected $copy_w; // 拷贝图形宽
    protected $copy_h; // 拷贝图形高
    protected $src_x = 0; // 原图绘制起始横坐标
    protected $src_y = 0; // 原图绘制起始纵坐标
    protected $start_x; // 新图绘制起始横坐标
    protected $start_y; // 新图绘制起始纵坐标
    protected $mask_word; // 水印文字
    protected $mask_img; // 水印图片
    protected $mask_pos_x = 0; // 水印横坐标
    protected $mask_pos_y = 0; // 水印纵坐标
    protected $mask_offset_x = 5; // 水印横向偏移
    protected $mask_offset_y = 5; // 水印纵向偏移
    protected $font_w; // 水印字体宽
    protected $font_h; // 水印字体高
    protected $mask_w; // 水印宽
    protected $mask_h; // 水印高
    protected $mask_font_color = '#000000'; // 水印文字颜色
    protected $mask_font = 5; // 水印字体
    protected $font_size; // 尺寸
    protected $mask_position = 0; // 水印位置
    protected $mask_img_pct = 50; // 图片合并程度,值越大，合并程序越低
    protected $mask_txt_pct = 50; // 文字合并程度,值越小，合并程序越低
    protected $img_border_size = 0; // 图片边框尺寸
    protected $img_border_color; // 图片边框颜色
    protected $_flip_x = 0; // 水平翻转次数
    protected $_flip_y = 0; // 垂直翻转次数
    protected $cut_type = 0; // 剪切或缩小类型
    protected $img_type; // 文件类型
    // 文件类型定义,并指出了输出图片的函数
    protected $all_type = array(
        'jpg' => array('output' => 'imagejpeg'),
        'gif' => array('output' => 'imagegif'),
        'png' => array('output' => 'imagepng'),
        'wbmp' => array('output' => 'image2wbmp'),
        'jpeg' => array('output' => 'imagejpeg'));

    /**
     * 构造函数
     */
    function __construct() {
        $this->mask_font_color = '#ffffff';
        $this->font = 2;
        $this->font_size = 12;
    }

    /**
     * 取得图片的宽
     */
    private function getImgWidth($src) {
        return imagesx($src);
    }

    /**
     * 取得图片的高
     */
    private function getImgHeight($src) {
        return imagesy($src);
    }

    /**
     * 设置原图片路径
     *
     * @param    string    $src_img   原图片路径
     */
    public function setSrcImg($src_img, $img_type = null) {
        if (!file_exists($src_img)) {
            die('图片不存在');
        }

        if (!empty($img_type)) {
            $this->img_type = $img_type;
        } else {
            $this->img_type = $this->_getImgType($src_img);
        }

        $this->_checkValid($this->img_type);

        // file_get_contents函数要求php版本>4.3.0
        $src = '';
        if (function_exists('file_get_contents')) {
            $src = file_get_contents($src_img);
        } else {
            $handle = fopen($src_img, 'r');
            while (!feof($handle)) {
                $src .= fgets($fd, 4096);
            }
            fclose($handle);
        }
        if (empty($src)) {
            die('图片源为空');
        }
        $this->h_src = @ImageCreateFromString($src);
        $this->src_w = $this->getImgWidth($this->h_src);
        $this->src_h = $this->getImgHeight($this->h_src);
    }

    /**
     * 设置图片生成路径
     *
     * @param    string    $dst_img   图片生成路径
     */
    public function setDstImg($dst_img) {
        //        $arr  = explode('/',$dst_img);
        //        $last = array_pop($arr);
        //        $path = implode('/',$arr);
        //        $this->_mkdirs($path);
        $this->dst_img = $dst_img;
    }

    /**
     * 设置图片的显示质量
     *
     * @param    string      $n    质量
     */
    public function setImgDisplayQuality($n) {
        $this->img_display_quality = (int) $n;
    }

    /**
     * 设置图片的生成质量
     *
     * @param    string      $n    质量
     */
    public function setImgCreateQuality($n) {
        $this->img_create_quality = (int) $n;
    }

    /**
     * 设置文字水印
     *
     * @param    string     $word    水印文字
     * @param    integer    $font    水印字体
     * @param    string     $color   水印字体颜色
     */
    public function setMaskWord($word) {
        $this->mask_word .= $word;
    }

    /**
     * 设置字体颜色
     *
     * @param    string     $color    字体颜色
     */
    public function setMaskFontColor($color = '#ffffff') {
        $this->mask_font_color = $color;
    }

    /**
     * 设置水印字体
     *
     * @param    string|integer    $font    字体
     */
    public function setMaskFont($font = 2) {
        if (!is_numeric($font) && !file_exists($font)) {
            die('字体文件不存在');
        }
        $this->font = $font;
    }

    /**
     * 设置文字字体大小,仅对truetype字体有效
     */
    public function setMaskFontSize($size = '12') {
        $this->font_size = $size;
    }

    /**
     * 设置图片水印
     *
     * @param    string    $img     水印图片源
     */
    public function setMaskImg($img) {
        $this->mask_img = $img;
    }

    /**
     * 设置水印横向偏移
     *
     * @param    integer     $x    横向偏移量
     */
    public function setMaskOffsetX($x) {
        $this->mask_offset_x = (int) $x;
    }

    /**
     * 设置水印纵向偏移
     *
     * @param    integer     $y    纵向偏移量
     */
    public function setMaskOffsetY($y) {
        $this->mask_offset_y = (int) $y;
    }

    /**
     * 指定水印位置
     *
     * @param    integer     $position    位置,1:左上,2:左下,3:右上,0/4:右下
     */
    public function setMaskPosition($position = 0) {
        $this->mask_position = (int) $position;
    }

    /**
     * 设置图片合并程度
     *
     * @param    integer     $n    合并程度
     */
    public function setMaskImgPct($n) {
        $this->mask_img_pct = (int) $n;
    }

    /**
     * 设置文字合并程度
     *
     * @param    integer     $n    合并程度
     */
    public function setMaskTxtPct($n) {
        $this->mask_txt_pct = (int) $n;
    }

    /**
     * 设置缩略图边框
     *
     * @param    (类型)     (参数名)    (描述)
     */
    public function setDstImgBorder($size = 1, $color = '#000000') {
        $this->img_border_size = (int) $size;
        $this->img_border_color = $color;
    }

    /**
     * 水平翻转
     */
    private function flipH() {
        $this->_flip_x++;
    }

    /**
     * 垂直翻转
     */
    private function flipV() {
        $this->_flip_y++;
    }

    /**
     * 设置剪切类型
     *
     * @param    (类型)     (参数名)    (描述)
     */
    public function setCutType($type) {
        $this->cut_type = (int) $type;
    }

    /**
     * 设置图片剪切
     *
     * @param    integer     $width    矩形剪切
     */
    public function setRectangleCut($width, $height) {
        $this->fill_w = (int) $width;
        $this->fill_h = (int) $height;
    }

    /**
     * 设置源图剪切起始坐标点
     *
     * @param    (类型)     (参数名)    (描述)
     */
    public function setSrcCutPosition($x, $y) {
        $this->src_x = (int) $x;
        $this->src_y = (int) $y;
    }

    /**
     * 创建图片,主函数
     * @param    integer    $a     当缺少第二个参数时，此参数将用作百分比，
     *                             否则作为宽度值
     * @param    integer    $b     图片缩放后的高度
     */
    public function createImg($a, $b = null) {
        $num = func_num_args();
        if (1 == $num) {
            $r = (int) $a;
            if ($r < 1) {
                die('图片缩放比例不得小于1');
            }
            $this->img_scale = $r;
            $this->_setNewImgSize($r);
        }

        if (2 == $num) {
            $w = (int) $a;
            $h = (int) $b;
            if (0 == $w) {
                die('目标宽度不能为0');
            }
            if (0 == $h) {
                die('目标高度不能为0');
            }
            $this->_setNewImgSize($w, $h);
        }

        if ($this->_flip_x % 2 != 0) {
            $this->_flipH($this->h_src);
        }

        if ($this->_flip_y % 2 != 0) {
            $this->_flipV($this->h_src);
        }
        $this->_createMask();
        $this->_output();

        // 释放
        if (imagedestroy($this->h_src) && imagedestroy($this->h_dst)) {
            Return true;
        } else {
            Return false;
        }
    }

    /**
     * 生成水印,调用了生成水印文字和水印图片两个方法
     */
    private function _createMask() {
        if ($this->mask_word) {
            // 获取字体信息
            $this->_setFontInfo();

            if ($this->_isFull()) {
                die('水印文字过大');
            } else {
                $this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h);
                $white = ImageColorAllocate($this->h_dst, 255, 255, 255);
                imagefilledrectangle($this->h_dst, 0, 0, $this->dst_w, $this->dst_h, $white); // 填充背景色
                $this->_drawBorder();
                imagecopyresampled($this->h_dst, $this->h_src, $this->start_x, $this->start_y, $this->src_x, $this->src_y, $this->fill_w, $this->fill_h, $this->copy_w, $this->copy_h);
                $this->_createMaskWord($this->h_dst);
            }
        }

        if ($this->mask_img) {
            $this->_loadMaskImg(); //加载时，取得宽高

            if ($this->_isFull()) {
                // 将水印生成在原图上再拷
                $this->_createMaskImg($this->h_src);
                $this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h);
                $white = ImageColorAllocate($this->h_dst, 255, 255, 255);
                imagefilledrectangle($this->h_dst, 0, 0, $this->dst_w, $this->dst_h, $white); // 填充背景色
                $this->_drawBorder();
                imagecopyresampled($this->h_dst, $this->h_src, $this->start_x, $this->start_y, $this->src_x, $this->src_y, $this->fill_w, $this->fill_h, $this->copy_w, $this->copy_h);
            } else {
                // 创建新图并拷贝
                $this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h);
                $white = ImageColorAllocate($this->h_dst, 255, 255, 255);
                imagefilledrectangle($this->h_dst, 0, 0, $this->dst_w, $this->dst_h, $white); // 填充背景色
                $this->_drawBorder();
                imagecopyresampled($this->h_dst, $this->h_src, $this->start_x, $this->start_y, $this->src_x, $this->src_y, $this->fill_w, $this->fill_h, $this->copy_w, $this->copy_h);
                $this->_createMaskImg($this->h_dst);
            }
        }

        if (empty($this->mask_word) && empty($this->mask_img)) {
            $this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h);
            $white = ImageColorAllocate($this->h_dst, 255, 255, 255);
            imagefilledrectangle($this->h_dst, 0, 0, $this->dst_w, $this->dst_h, $white); // 填充背景色
            $this->_drawBorder();

            imagecopyresampled($this->h_dst, $this->h_src, $this->start_x, $this->start_y, $this->src_x, $this->src_y, $this->fill_w, $this->fill_h, $this->copy_w, $this->copy_h);
        }
    }

    /**
     * 画边框
     */
    private function _drawBorder() {
        if (!empty($this->img_border_size)) {
            $c = $this->_parseColor($this->img_border_color);
            $color = ImageColorAllocate($this->h_src, $c[0], $c[1], $c[2]);
            imagefilledrectangle($this->h_dst, 0, 0, $this->dst_w, $this->dst_h, $color); // 填充背景色
        }
    }

    /**
     * 生成水印文字
     */
    private function _createMaskWord($src) {
        $this->_countMaskPos();
        $this->_checkMaskValid();

        $c = $this->_parseColor($this->mask_font_color);
        $color = imagecolorallocatealpha($src, $c[0], $c[1], $c[2], $this->mask_txt_pct);

        if (is_numeric($this->font)) {
            imagestring($src, $this->font, $this->mask_pos_x, $this->mask_pos_y, $this->mask_word, $color);
        } else {
            imagettftext($src, $this->font_size, 0, $this->mask_pos_x, $this->mask_pos_y, $color, $this->font, $this->mask_word);
        }
    }

    /**
     * 生成水印图
     */
    private function _createMaskImg($src) {
        $this->_countMaskPos();
        $this->_checkMaskValid();
        imagecopymerge($src, $this->h_mask, $this->mask_pos_x, $this->mask_pos_y, 0, 0, $this->mask_w, $this->mask_h, $this->mask_img_pct);

        imagedestroy($this->h_mask);
    }

    /**
     * 加载水印图
     */
    private function _loadMaskImg() {
        $mask_type = $this->_getImgType($this->mask_img);
        $this->_checkValid($mask_type);

        // file_get_contents函数要求php版本>4.3.0
        $src = '';
        if (function_exists('file_get_contents')) {
            $src = file_get_contents($this->mask_img);
        } else {
            $handle = fopen($this->mask_img, 'r');
            while (!feof($handle)) {
                $src .= fgets($fd, 4096);
            }
            fclose($handle);
        }
        if (empty($this->mask_img)) {
            die('水印图片为空');
        }
        $this->h_mask = ImageCreateFromString($src);
        $this->mask_w = $this->getImgWidth($this->h_mask);
        $this->mask_h = $this->getImgHeight($this->h_mask);
    }

    /**
     * 图片输出
     */
    private function _output() {
        $img_type = $this->img_type;
        $func_name = $this->all_type[$img_type]['output'];
        if (function_exists($func_name)) {
            // 判断浏览器,若是IE就不发送头
            if (isset($_SERVER['HTTP_USER_AGENT'])) {
                $ua = strtoupper($_SERVER['HTTP_USER_AGENT']);
                if (!preg_match('/^.*MSIE.*\)$/i', $ua)) {
                    header("Content-type:$img_type");
                }
            }
            if ($func_name == 'imagepng') {
                $func_name($this->h_dst, $this->dst_img);
            } else {
                $func_name($this->h_dst, $this->dst_img, $this->img_display_quality);
            }
        } else {
            Return false;
        }
    }

    /**
     * 分析颜色
     *
     * @param    string     $color    十六进制颜色
     */
    private function _parseColor($color) {
        $arr = array();
        for ($ii = 1; $ii < strlen($color); $ii++) {
            $arr[] = hexdec(substr($color, $ii, 2));
            $ii++;
        }

        Return $arr;
    }

    /**
     * 计算出位置坐标
     */
    private function _countMaskPos() {
        if ($this->_isFull()) {
            switch ($this->mask_position) {
                case 1:
                    // 左上
                    $this->mask_pos_x = $this->mask_offset_x + $this->img_border_size;
                    $this->mask_pos_y = $this->mask_offset_y + $this->img_border_size;
                    break;

                case 2:
                    // 左下
                    $this->mask_pos_x = $this->mask_offset_x + $this->img_border_size;
                    $this->mask_pos_y = $this->src_h - $this->mask_h - $this->mask_offset_y;
                    break;

                case 3:
                    // 右上
                    $this->mask_pos_x = $this->src_w - $this->mask_w - $this->mask_offset_x;
                    $this->mask_pos_y = $this->mask_offset_y + $this->img_border_size;
                    break;

                case 4:
                    // 右下
                    $this->mask_pos_x = $this->src_w - $this->mask_w - $this->mask_offset_x;
                    $this->mask_pos_y = $this->src_h - $this->mask_h - $this->mask_offset_y;
                    break;

                default:
                    // 默认将水印放到右下,偏移指定像素
                    $this->mask_pos_x = $this->src_w - $this->mask_w - $this->mask_offset_x;
                    $this->mask_pos_y = $this->src_h - $this->mask_h - $this->mask_offset_y;
                    break;
            }
        } else {
            switch ($this->mask_position) {
                case 1:
                    // 左上
                    $this->mask_pos_x = $this->mask_offset_x + $this->img_border_size;
                    $this->mask_pos_y = $this->mask_offset_y + $this->img_border_size;
                    break;

                case 2:
                    // 左下
                    $this->mask_pos_x = $this->mask_offset_x + $this->img_border_size;
                    $this->mask_pos_y = $this->dst_h - $this->mask_h - $this->mask_offset_y - $this->img_border_size;
                    break;

                case 3:
                    // 右上
                    $this->mask_pos_x = $this->dst_w - $this->mask_w - $this->mask_offset_x - $this->img_border_size;
                    $this->mask_pos_y = $this->mask_offset_y + $this->img_border_size;
                    break;

                case 4:
                    // 右下
                    $this->mask_pos_x = $this->dst_w - $this->mask_w - $this->mask_offset_x - $this->img_border_size;
                    $this->mask_pos_y = $this->dst_h - $this->mask_h - $this->mask_offset_y - $this->img_border_size;
                    break;

                default:
                    // 默认将水印放到右下,偏移指定像素
                    $this->mask_pos_x = $this->dst_w - $this->mask_w - $this->mask_offset_x - $this->img_border_size;
                    $this->mask_pos_y = $this->dst_h - $this->mask_h - $this->mask_offset_y - $this->img_border_size;
                    break;
            }
        }
    }

    /**
     * 设置字体信息
     */
    private function _setFontInfo() {
        if (is_numeric($this->font)) {
            $this->font_w = imagefontwidth($this->font);
            $this->font_h = imagefontheight($this->font);

            // 计算水印字体所占宽高
            $word_length = strlen($this->mask_word);
            $this->mask_w = $this->font_w * $word_length;
            $this->mask_h = $this->font_h;
        } else {
            $arr = imagettfbbox($this->font_size, 0, $this->font, $this->mask_word);
            $this->mask_w = abs($arr[0] - $arr[2]);
            $this->mask_h = abs($arr[7] - $arr[1]);
        }
    }

    /**
     * 设置新图尺寸
     *
     * @param    integer     $img_w   目标宽度
     * @param    integer     $img_h   目标高度
     */
    private function _setNewImgSize($img_w, $img_h = null) {
        $num = func_num_args();
        if (1 == $num) {
            $this->img_scale = $img_w; // 宽度作为比例
            $this->fill_w = round($this->src_w * $this->img_scale / 100) - $this->img_border_size * 2;
            $this->fill_h = round($this->src_h * $this->img_scale / 100) - $this->img_border_size * 2;

            // 源文件起始坐标
            $this->src_x = 0;
            $this->src_y = 0;
            $this->copy_w = $this->src_w;
            $this->copy_h = $this->src_h;

            // 目标尺寸
            $this->dst_w = $this->fill_w + $this->img_border_size * 2;
            $this->dst_h = $this->fill_h + $this->img_border_size * 2;
        }

        if (2 == $num) {
            $fill_w = (int) $img_w - $this->img_border_size * 2;
            $fill_h = (int) $img_h - $this->img_border_size * 2;
            if ($fill_w < 0 || $fill_h < 0) {
                die('图片边框过大，已超过了图片的宽度');
            }
            $rate_w = $this->src_w / $fill_w;
            $rate_h = $this->src_h / $fill_h;

            switch ($this->cut_type) {
                case 0:
                    // 如果原图大于缩略图，产生缩小，否则不缩小
                    if ($rate_w < 1 && $rate_h < 1) {
                        $this->fill_w = (int) $this->src_w;
                        $this->fill_h = (int) $this->src_h;
                    } else {
                        if ($rate_w >= $rate_h) {
                            $this->fill_w = (int) $fill_w;
                            $this->fill_h = round($this->src_h / $rate_w);
                        } else {
                            $this->fill_w = round($this->src_w / $rate_h);
                            $this->fill_h = (int) $fill_h;
                        }
                    }

                    $this->src_x = 0;
                    $this->src_y = 0;

                    $this->copy_w = $this->src_w;
                    $this->copy_h = $this->src_h;

                    // 目标尺寸
                    $this->dst_w = $this->fill_w + $this->img_border_size * 2;
                    $this->dst_h = $this->fill_h + $this->img_border_size * 2; //(原代码: 补偿round误差 消除白边; $this->fill_h + $this->img_border_size*2 - 10)
                    break;

                // 自动裁切
                case 1:
                    // 如果图片是缩小剪切才进行操作
                    if ($rate_w >= 1 && $rate_h >= 1) {
                        if ($this->src_w > $this->src_h) {
                            $src_x = round($this->src_w - $this->src_h) / 2;
                            $this->setSrcCutPosition($src_x, 0);
                            $this->setRectangleCut($fill_h, $fill_h);

                            $this->copy_w = $this->src_h;
                            $this->copy_h = $this->src_h;
                        } elseif ($this->src_w < $this->src_h) {
                            $src_y = round($this->src_h - $this->src_w) / 2;
                            $this->setSrcCutPosition(0, $src_y);
                            $this->setRectangleCut($fill_w, $fill_h);

                            $this->copy_w = $this->src_w;
                            $this->copy_h = $this->src_w;
                        } else {
                            $this->setSrcCutPosition(0, 0);
                            $this->copy_w = $this->src_w;
                            $this->copy_h = $this->src_w;
                            $this->setRectangleCut($fill_w, $fill_h);
                        }
                    } else {
                        $this->setSrcCutPosition(0, 0);
                        $this->setRectangleCut($this->src_w, $this->src_h);

                        $this->copy_w = $this->src_w;
                        $this->copy_h = $this->src_h;
                    }

                    // 目标尺寸
                    $this->dst_w = $this->fill_w + $this->img_border_size * 2;
                    $this->dst_h = $this->fill_h + $this->img_border_size * 2;

                    break;

                // 手工裁切
                case 2:
                    $this->copy_w = $this->fill_w;
                    $this->copy_h = $this->fill_h;

                    // 目标尺寸
                    $this->dst_w = $this->fill_w + $this->img_border_size * 2;
                    $this->dst_h = $this->fill_h + $this->img_border_size * 2;

                    break;
                default:
                    break;
            }
        }

        // 目标文件起始坐标
        $this->start_x = $this->img_border_size;
        $this->start_y = $this->img_border_size;
    }

    /**
     * 检查水印图是否大于生成后的图片宽高
     */
    private function _isFull() {
        Return ( $this->mask_w + $this->mask_offset_x > $this->fill_w || $this->mask_h + $this->mask_offset_y > $this->fill_h) ? true : false;
    }

    /**
     * 检查水印图是否超过原图
     */
    private function _checkMaskValid() {
        if ($this->mask_w + $this->mask_offset_x > $this->src_w
                || $this->mask_h + $this->mask_offset_y > $this->src_h) {
            die('水印图片尺寸大于原图，请缩小水印图');
        }
    }

    /**
     * 取得图片类型
     *
     * @param    string     $file_path    文件路径
     */
    private function _getImgType($file_path) {
        $type_list = array('1' => 'gif', '2' => 'jpg', '3' => 'png', '4' => 'swf', '5' => 'psd', '6' => 'bmp', '15' => 'wbmp');
        if (file_exists($file_path)) {
            $img_info = @getimagesize($file_path);
            if (isset($type_list[$img_info[2]])) {
                Return $type_list[$img_info[2]];
            }
        } else {
            die('文件不存在,不能取得文件类型!');
        }
    }

    /**
     * 检查图片类型是否合法,调用了array_key_exists函数，此函数要求
     * php版本大于4.1.0
     *
     * @param    string     $img_type    文件类型
     */
    private function _checkValid($img_type) {
        if (!array_key_exists($img_type, $this->all_type)) {
            Return false;
        }
    }

    /**
     * 按指定路径生成目录
     *
     * @param    string     $path    路径
     */
    private function _mkdirs($path) {
        $adir = explode('/', $path);
        $dirlist = '';
        $rootdir = array_shift($adir);
        if (($rootdir != '.' || $rootdir != '..') && !file_exists($rootdir)) {
            @mkdir($rootdir);
        }
        foreach ($adir as $key => $val) {
            if ($val != '.' && $val != '..') {
                $dirlist .= '/' . $val;
                $dirpath = $rootdir . $dirlist;
                if (!file_exists($dirpath)) {
                    @mkdir($dirpath);
                    @chmod($dirpath, 0777);
                }
            }
        }
    }

    /**
     * 垂直翻转
     *
     * @param    string     $src    图片源
     */
    private function _flipV($src) {
        $src_x = $this->getImgWidth($src);
        $src_y = $this->getImgHeight($src);

        $new_im = imagecreatetruecolor($src_x, $src_y);
        for ($y = 0; $y < $src_y; $y++) {
            imagecopy($new_im, $src, 0, $src_y - $y - 1, 0, $y, $src_x, 1);
        }
        $this->h_src = $new_im;
    }

    /**
     * 水平翻转
     *
     * @param    string     $src    图片源
     */
    private function _flipH($src) {
        $src_x = $this->getImgWidth($src);
        $src_y = $this->getImgHeight($src);

        $new_im = imagecreatetruecolor($src_x, $src_y);
        for ($x = 0; $x < $src_x; $x++) {
            imagecopy($new_im, $src, $src_x - $x - 1, 0, $x, 0, 1, $src_y);
        }
        $this->h_src = $new_im;
    }

}